1941 Ford GP W Military Jeep Walk Around Military Video Review, Ford GP Army Jeep. The Ford GP Army jeep originated many of the design features that became part of the standard World War II Army jeep. s one of the largest manufacturers of motor vehicles in the U.S., Ford was eager to play a major role in production of the Army's new jeep vehicle. The full story of the development of the original Army Jeep of World War II